Chondroitin Sulphate: A sulfated glycosaminoglycan (mucopolysaccharide) composed of repeating disaccharide units of glucuronic acid and $N$-acetylgalactosamine.
It is an abundant structural component of the cartilaginous endoskeleton, cranial cartilage, and dermal connective tissues of elasmobranchs (sharks and rays) and teleosts, widely extracted industrially for pharmaceutical and nutraceutical joint-health formulations.
Correct Option: Option 2 (Chondroitin sulphate).
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Q.72
Fish Processing Technology- ICAR JRF/SRF 2024
MCQ (Single Correct)+4−1
Octopine, an amino acids derivative, is specific to ——-—-
Octopine ($N^2$-(1-carboxyethyl)-L-arginine) is an opine derivative of L-arginine and pyruvate synthesized by the enzyme octopine dehydrogenase (ODH).
In cephalopods (squid, cuttlefish, octopus), octopine acts as the primary anaerobic end-product of muscular contraction during vigorous jet-propulsion swimming, functioning analogously to lactate in teleost fishes.
Correct Option: Option 1 (Cephalopods).
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Q.73
Fish Processing Technology- ICAR JRF/SRF 2024
MCQ (Single Correct)+4−1
The increase in concentration of a contaminant in the tissues of organisms at successively higher levels in a food chain is
called
Biomagnification: The progressive increase in the concentration of persistent, bioaccumulative chemical contaminants (e.g., methylmercury, PCBs, DDT) in the tissues of organisms at successively higher trophic levels within a food chain.
Bioaccumulation: The net accumulation of a substance in an individual organism from both water and diet over its lifespan.
Correct Option: Option 2 (Biomagnification).
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Q.74
Fish Processing Technology- ICAR JRF/SRF 2024
MCQ (Single Correct)+4−1
One of the following is not an aliphatic biogenic amines
In High-Performance Liquid Chromatography (HPLC), the theoretical plate height ($H$) is described by the van Deemter equation:
$$H = A + \frac{B}{u} + C u$$
Reducing the particle size of the stationary phase ($d_p$) from $10\,\mu\text{m}$ to $3-5\,\mu\text{m}$ (or sub-$2\,\mu\text{m}$ in UHPLC) substantially decreases eddy diffusion ($A \propto d_p$) and stationary phase mass transfer resistance ($C \propto d_p^2$).
This drastically reduces band broadening and increases theoretical plate numbers ($N$), resulting in superior chromatographic resolution and performance.
Correct Option: Option 1 (Decreased particle size of the stationary phase).
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